Some professions are harder than you might think

This isn't quite technically accurate (it would be done on a computer, and for THIS singer it would be impossible to do in real time), but the video (if not all of the audio!) is enjoyable anyway:
The profession of a sound engineer 2013
https://www.facebook.com/photo.php?v=10151428843259073

There's a popular news article about Autotune just about every year since Cher's big hit that used it as an effect. If it's not used as an effect, it's used to make vocal recordings perfect-pitch on every pop song. Here's the latest story:

http://www.theverge.com/2013/2/27/3964406/seduced-by-perfect-pitch-how-auto-tune-conquered-pop-music